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W3C CSS2 Cascading Style Sheets, level 2 - instructional media + ...

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TrueDoc<br />

TrueDoc technology was developed by Bitstream for the creation, transport,<br />

and imaging of platform independent scalable font objects on the web.<br />

Creation of font objects is done by the TrueDoc character shape recorder<br />

(CSR) and the rendering of the font objects is done by TrueDoc’s character<br />

shape player (CSP). The technology is intended to be used on the web for<br />

viewing and printing.<br />

TrueDoc Portable Font Resource<br />

A TrueDoc Portable font resource (or, PFR) is a platform-independent scalable<br />

font object that is produced by a character shape player. Input may be<br />

either TrueType or Type 1 of any flavor on either Windows, Mac, or Unix.<br />

TrueDoc Portable Font Resources provide good compression ratios, are<br />

platform independent, and because they are not in an native font format<br />

(TrueType or Type 1) they can not be easily installed.<br />

TrueType<br />

TrueType is a font format developed by Apple and licensed to Microsoft.<br />

TrueType is the native operating system font format for Windows and Macintosh.<br />

TrueType contains a hierarchical set of tables and glyph representations.<br />

Characters can be hinted on a per character and point size basis yielding<br />

excellent quality at screen resolutions. TrueType fonts for Windows and<br />

Mac have few differences, though they can be different enough to prevent<br />

cross platform usage.<br />

TrueType Collection<br />

A TrueType Collection (or TTC) is an extension to the TrueType format that<br />

includes tables that allow for multiple TrueType fonts to be contained within<br />

a single TrueType font file. TrueType collection files are relatively rare at this<br />

time.<br />

TrueType GX Fonts<br />

TrueType GX Fonts contain extensions to the standard TrueType format that<br />

allow for mutable fonts, similar to Multiple Master fonts. There may be<br />

several mutation axis such as weight, height, and slant. The axis can be<br />

defined to obtain almost any effect. TrueType GX can also supports alternate<br />

glyph representation substitution for ligatures, contextual forms, fractions,<br />

etc. To date, TrueType GX is available only on the Mac (see [TRUE-<br />

TYPEGX]).<br />

Type 1 font<br />

Type 1 fonts, developed by Adobe Systems, were one of first scalable<br />

formats available. Type 1 fonts generally contain 228 characters with the<br />

glyph representations described using third degree bezier curves. Mac,<br />

Windows, and X have similar but separate formats; Adobe provides Adobe<br />

Type Manager for all three platforms. Type1c is a more recent losslessly-compressed<br />

storage form for Type 1 glyph representations.<br />

URI Binding<br />

A process of locking a particular font resource to a given Web site by<br />

embedding an encrypted URI or a digitally signed usage assertion into the<br />

font resource.<br />

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